绵羊断奶体重以五日龄划分的校正  

Correction for Weaning Weight of Sheep by 5-Days Age

作　　者：李佳莹 梁龙 贺鑫 巴音花 何鹏飞 张宁 贺三刚 LI Jia-ying;LIANG Long;HE Xin;BAYINHUA;HE Peng-fei;ZHANG Ning;HE San-gang(College of Animal Science,Xinjiang Agricultural University,Urumqi 830052,China;Institute of Biotechnology of Xinjiang Academy of Animal Husbandry Sciences/Key Laboratory of Genetics,Breeding and Reproduction of Herbivorous Livestock of the Ministry of Agriculture and Rural Affairs/Key Laboratory of Animal Biotechnology of Xinjiang,Urumqi 830011,China)

机构地区：[1]新疆农业大学动物科学学院,乌鲁木齐830052 [2]新疆畜牧科学院生物技术研究所/农业农村部草食家畜遗传育种与繁殖重点实验室/新疆动物生物技术重点实验室,乌鲁木齐830011

出　　处：《草食家畜》2023年第1期22-27,共6页Grass-Feeding Livestock

基　　金：新疆维吾尔自治区区域协同创新专项“上海合作组织科技伙伴计划及国际科技合作计划”项目(2020E01004);国家重点研发计划项目(2017YFE0117900);新疆维吾尔自治区牧区地方肉羊品种选育推广技术体系项目。

摘　　要：旨将不同日龄羔羊断奶重校正为同一日龄,弥补羔羊断奶重误差的缺陷。以特哈杂交F2代断奶羔羊体重与断奶天数为变量做散点图,判断为线性回归关系。将群体划分为单胎公羊、单胎母羊、双胎公羊、双胎母羊四个水平。通过统计软件SPSS26.0建立线性回归方程,将断奶日龄以五天划分为一组,取组限中数带入回归方程中为断奶重的校正日龄值。校正系数为校正日龄体重值除以断奶重的理论值,校正体重为校正系数乘以实际体重。单胎公羊、单胎母羊、双胎公羊、双胎母羊四种类型的断奶日龄与断奶重的回归方程分别为y=0.205x+12.404;y=0.195x+11.472;y=0.212x+3.218;y=0.216x+1.203。四组类别的相关系数分别为0.468、0.571、0.503、0.516,均有极显著的影响(P<0.01),并大于总体相关系数。为羔羊断奶重的选种选育提供了良好的科学理论基础。The purpose of this study was to correct the weaning weight of lambs at different age to the same age to compensate for the error of weaning weight of lambs. A scatter plot was made with the body weight and weaning days of F2 generation Teha crossbred lambs as variables, which was judged to be a linear regression relationship. The population was divided into four levels: single ram, single ewes, twin ram and twin ewes.The linear regression equation was established by statistical software SPSS26.0, and the weaning days were divided into groups of five days, and the median number of the group limit was substituted into the regression equation as the corrected age value of weaning weight. The corrected weight was divided by the theoretical weight of weaning, and the corrected weight was the corrected coefficient multiplied by the actual weight..The regression equation of weaning age and weaning weight of single ram, single ewes, twin ram and twin ewes were y =0.205x+12.404;y=0.195x+11.472;y=0.212x+3.218;y=0.216x+1.203.The correlation coefficients of the four groups were 0.468, 0.571, 0.503 and 0.516, respectively, which were significantly higher than the overall correlation coefficients(P<0.01). It provides a good scientific theoretical basis for the selection and breeding of lambs weaning weight.

关 键 词：特哈杂交F2代绵羊 断奶重 校正 

分 类 号：S826[农业科学—畜牧学]